Pullmaster M12 Series - Page 14

PAGE 14
MINOR SURFACE DEFECTS WHERE THE SPRAG CLUTCH ENGAGES THE
BRAKE SHAFT AND BRAKE HUB, WILL RESULT IN BRAKE
FAILURE AND ALLOW THE LOAD TO DROP, CAUSING PROPERTY
DAMAGE, SEVERE INJURY OR DEATH. THOROUGHLY INSPECT
THESE AREAS AND, IF NECESSARY, REPLACE BRAKE SHAFT,
SPRAG CLUTCH AND BRAKE HUB AS A SET.
DAMAGED FRICTION OR DIVIDER PLATES WILL REDUCE BRAKING
CAPACITY AND ALLOW THE LOAD TO DROP CAUSING PROPERTY
DAMAGE, SEVERE INJURY OR DEATH. DO NOT USE SOLVENT TO
CLEAN THE FRICTION PLATES. PERFORM THOROUGH
INSPECTION AND, IF NECESSARY, REPLACE FRICTION
AND DIVIDER PLATES AS A SET.
316 REV.980601
DANGER
DANGER
SERVICE INSTRUCTIONS CONTINUED
7) Pull primary sungear, item 440, with brake hub assembly, item 720, and clutch aligners, items 722 and 724,
from brake housing.
8) Disassemble brake hub assembly by removing circlip, item 727, from primary sungear, item 440. Remove
primary sungear from brake hub, item 720. Remove sprag clutch aligners, items 722 and 724, and sprag clutch,
item 723, from brake hub.
9) Thoroughly inspect primary sungear, item 440, and brake hub, item 720, particularly surfaces where sprag
clutch, item 723, engages.
10) If any indentation or surface damage is detected, replace brake hub, sprag clutch and primary sungear as a
set.
11) Remove four friction plates, item 715, and five divider plates, item 713, and inspect for damage or wear. Plates
should be flat and smooth. Plates should not show heat discoloration. Paper material on friction plates should
be intact and grooved. If any damage is detected, replace friction and divider plates as a set.
12) Remove thrust bearing, item 739, and thrust washers, item 737. Inspect bearing and washers and replace if
damaged or worn.
13) Remove two flat head capscrews, item 693, and brake housing, item 700. Remove brake spacer, item 712, and
discard O-ring, item 695.